Fly-wheel for explosive-engines.



No. 795,698. .PATENTED JULY 25, 1905.

w. B. HAYDEN.

FLY WHEEL FOR EXPLOSIVE ENGINES.

APPLICATION FILED DEC. 17, 1904.

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WILLIAM B. HAYDEN, OF NEW YORK, N. Y.

FLY-WHEEL FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed December 17, 1904. Serial No. 237,280.

. plosive-engines.

In explosive-engines as now generally constructed certain difficulties are presented in overcoming the inertia of the fly-wheel on the initial explosion to do away with strain upon the machinery when starting. To overcome this inertia of the fly-wheel, itnecessitates generally the initial operation of the flywheel by hand or by a crank, which causes such initial operation to be inconvenient and laborious to the operator.

Therefore it is the object of this invention to overcome this inconvenient and laborious manner of initially operating the fly-wheel and to provide a new form of fly-wheel for explosive-engines whereby the strain upon the machinery caused by the inertia of the fly-wheel when starting or reversing the engine is practically avoided.

In fly-wheels as generally constructed the entire fly-wheel is keyed rigidly to the engineshaft; but in accordance with this invention the fly-wheel is formed of two sections, an outer and an inner section, and "the inner section is the only part of the fly-wheel which is keyed rigidly to the engine-shaft, while the outer or heavier section is loosely fitted upon the inner section, and the said sections are bodily movable together in both directions that is to say,bodily movable together whether the engine is running ahead or in a reverse directionand for such purpose the sections are connected together through the medium of suitable frictional coupling devices carried by the outer section, said devices being so adjusted that the inertia of the weighted outer section is gradually overcome, dividing the strain during one half-stroke instead. of on the instant of explosion, thereby avoiding all serious strain upon the engine and making it practicable to start when stationary or reversed while in motion.

The invention further aims to construct a fly-wheel for the purpose set forth which shall be simple in its construction, strong, durable, eflicient in its use, and comparatively inexpensive to set up. 7

With the foregoing and other objects in view the invention consists of the novel construction, combination, and arrangement'of parts hereinafter more specifically described, illustrated in the accompanying drawings, which form a part of this specification, and

wherein is shown the preferred embodiment, of the invention; but it is to be understood that changes, variations, and modifications can be resorted to which come fully within the scope of the claims hereunto appended.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification, wherein like reference characters denote corresponding parts throughout both the views, and in which Figure 1 is a vertical sectional view of a flywheel constructed in accordance with this invention; and Fig. 2 is a sectional detail of one of the members of the outer section, showing a modified form of coupling device.

The wheel is formed of an inner section 1 and a weighted outer section formed of two members 2 3, connected together by a plurality of coupling devices for forming'a normal frictional union between said inner and outer sections. The inner or lighter section 1 is in the form of a wheel and is keyed, as at 4:, to the engine-shaft 5. Each of the memhere 2 3 of the outer section has the inner face, near the inner end thereof, cut away so as to form a seat 6, adapted to rest upon the periphery 7 of the inner section 1, and the cutting away of the said members 2 3 causes said outer section to straddle the inner section 1 when said outer section is set in position. Each of the members 2 3 is further pro- -vided on its inner face, near the outer end thereof, with an offset 8. Said oflsets 8 are adapted to abut, or nearly so, when the outer section is mounted in position, forming there by a recess 9 between said members. The member 3 is formed with a plurality of countersunk openings 10 and the member 2 with a plurality of screw-threaded recesses 11, which correspond in number to the number of openings 10, and said recesses 11 are arranged in alinement with the openings 10.

The members 2 3 are connected together through the medium of the coupling-screws 12, which extend through the openings 10 and engage in the screw-threaded recesses 11. The coupling-screws 12 not only connect the members 2 3 together, but cause a frictional engagement between the margin of the inner section 1 and that portion of the inner face ence character 13. sitioned'within the recesses 11 that africtional union will be had between the margin of the inner section 1 and the outer weighted section.

In the modified construction shown in Fig. 2 the difference is that between the head 14 of the coupling-screw 15 and the member 3 an elastic washer 16 and metallic washer 17 is interposed, whereas the said Washers are dispensed with in the structure shown in Fig. 1.

Otherwise than that as stated the modified construction is the same as that shown in Fig. 1.

In both structures set forth the coupling members form a frictional union between the outer and inner section; but this frictional union is such that when the inner section is rotated through the medium of the engine-shaft the inertia of the outer section is gradually overcome, owing to the fact that the inner section moves in advance of the outer section and does not take up the outer section until a fractional part of stroke has been made, and by such operation it is evident that on starting the engine the heavier strains upon the machinery are overcome for the reason that the fly-wheel as an entirety does not operate on initially starting, but the weighted portion of the fly-wheel is taken up after the engine has started. If the engine is reversed, the inner section will travel for an instant in an opposite direction to that of the outer section, but will eventually carry the outer section therewith, owing to the frictional coupling device.

From the foregoing description, taken in connection with the accompanying drawings, it will be evident that afly-wheel for explosiveengines is set up so that the inertia of the weighted outer section is gradually overcome,

consequently dividing the strain during one half-stroke instead of on the instant of explosion, or rather when initially starting the engine.

Having thus fully described my invention, what I'claim as new, and desire to secure by Letters Patent, is f l. A fly-wheel for explosive-engines com- I of said members 2 8 indicated by the referprising an inner section adapted to be fixed The screws 12 are so poto the engine-shaft, a removable outer section straddling and inclosing said inner section, said outer section formed of two separable members having abutting offsets and seats, and means extending through one of said members and engaging in the other of said members for connecting the members together and for frictionally connecting the sections together.

2. A fly-wheel for explosive-engines comprising an inner section adapted to be fixed to the engine-shaft, a removable outer section straddling and inclosing said inner section, said outer section formed of two separable members having abutting offsets and seats, and adjustable means extending through one of said members and engaging in the other of said members for connecting the members together and for frictionally connecting the sections together.

3. A fly-wheel for explosive-engines comprising an inner section, an outer section formed of two separate'members having portions of their length abutting, said outer section straddling and inclosing the periphery of said inner section, and means extending through one of said members and engaging the other of said members for connecting the members together and for 'lrictionally connecting the sections together.

4. A fly-wheel for explosive-engines comprising an inner section, an outer section formed of two separable members having portions of their length abutting, said outer section straddling and inclosing the periphery of said inner section, and adjustable means extending through one of said members and engaging the other of said members for connecting the members together and for frictionally connecting the sections together.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. H

WILLIAM BFHAYDEN. W'itnesses:

Co'rToN ALLEN HAYDEN, CALVIN BURR. 

